JPH10263122A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispose the center of gravity of a head in a lower part,, in a club head of hollow structure comprising a sole and a crust for metal and wood golf club heads and a long iron golf club head, etc., integrally molded with metallic materials. SOLUTION: A crust 4 for a main body of a club head comprises titanium metal, aluminum metal, stainless metal, etc., and a sole 3 comprises tantalum, tungsten metal, etc., having the specific gravity higher than the metallic material for the crust 4. The sole 3 comprises metallic material having the specific gravity 3.5 to 11 times higher than the metallic material for the crust 4 excluding the sole 3, and the wall thickness of the sole 3 is made to be 2 to 3 mm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head, and more particularly, to a metal wood golf club head, a long iron golf club head, etc., in which a sole portion and an outer shell portion are integrally formed of a metal material. TECHNICAL FIELD The present invention relates to a golf club head having a hollow structure having a hollow structure, wherein the center of gravity of the head can be arranged below.

[0002]

2. Description of the Related Art Conventionally, in a club head in which a sole portion and an outer shell portion such as a metal wood golf club head and a long iron golf club head are integrally formed of a metal material, the capacity of the club head is increased. In order to make it possible to obtain a stable feeling at the time of shots, a hollow structure is used.

[0003]

By the way, in the club head having the hollow structure as described above, in order to make it easy for the ball to rise when hitting a ball and to increase the flight distance, the moment of inertia around the center of gravity of the club head is increased. It is important to lower the center of gravity of the club head or to increase the depth of the center of gravity (the distance from the center line of the shaft to the center of gravity).

For this reason, the outer shell of the head body has a thinner upper portion and a lower portion and a rear portion have a thicker wall so that the center of gravity of the club head is located below and behind, and a weight is provided inside the sole portion. And the center of gravity is disposed below. However, in such a conventional method, there is a limit to lowering the position of the center of gravity, and it is difficult to increase the moment of inertia around the center of gravity of the club head, and it is also difficult to further increase the depth of the center of gravity.

The present invention has been devised in view of such a conventional problem. A first object is to adjust the thickness of the outer shell of a metal hollow head body without adjusting the thickness of the outer shell. The center of gravity of the head can be located below, which increases the hollow ratio and increases the moment of inertia around the center of gravity of the club head as compared to conventional club heads, enabling stable shots It is an object of the present invention to provide a golf club head capable of performing the following.

Another object of the present invention is to dispose the weight at a position below the center of gravity of the club head main body and at the rearward optimum position, thereby disposing the center of gravity of the club head main body below and rearward. It is an object of the present invention to provide a golf club head that can increase the depth of the center of gravity, easily lift the ball when hitting a ball, and can perform a stable shot.

[0007]

To achieve the above object, the present invention provides a golf club head having a hollow structure in which a sole portion and an outer shell portion are integrally formed of a metal material. The gist of the present invention is that the outer shell portion excluding the sole portion is made of a metal material that is 3.5 times or more and 11 times or less the specific gravity of the metal material.

The thickness of the sole portion is set to 2 mm or more and 3 mm or less, and the outer shell metal of the club head body is made of titanium metal, aluminum metal, stainless steel metal, etc., and the metal of the sole portion is tantalum, It is made of tungsten metal or the like. In addition, the present invention provides an origin O below the center of gravity of the club head body, that is, the center of gravity when the club head is installed on a horizontal plane, and a line passing through the origin O and perpendicular to the horizontal plane is defined as a Y-axis. When the X-axis is parallel to the horizontal plane and perpendicular to the leading edge of the club head, the point is to provide a weight in the third quadrant of the coordinate system.

The weight is made of, for example, tantalum, tungsten metal or the like. The present invention is configured as described above, and in a golf club head having a hollow structure in which a sole portion and an outer shell portion are integrally formed of a metal material, the sole portion is formed of a metal material of the outer shell portion excluding the sole portion. Is made of a metal material that is 3.5 times or more and 11 times or less with respect to the specific gravity of
By setting the center of gravity to 2 mm or more and 3 mm or less, the center of gravity of the head can be arranged below, and the ball can be easily lifted when hitting a ball, and the hollow ratio increases compared to the conventional club head. Thus, the moment of inertia around the center of gravity of the club head can be increased, and a stable shot can be performed.

The specific gravity of the sole portion is not more than 3.5 times the specific gravity of the metal material of the outer shell portion, or the thickness is 3 mm.
Is exceeded, it is difficult to reduce the center of gravity of the club head. Further, if the specific gravity of the metal material of the outer shell is 11 times or more, it is very difficult to select and purchase the material, and if the thickness of the sole is 2 mm or less, the strength becomes insufficient. In the case of a conventional club head in which the weight is fixed, it is difficult to increase the moment of inertia around the center of gravity due to a low hollow ratio. However, in the present invention, the material specific gravity of the sole portion in addition to the weight is reduced. By setting the thickness to 2 mm or more and 3 mm or less, the hollowness is increased, and a stable shot can be performed by increasing the moment of inertia around the center of gravity of the club head.

The position of the center of gravity when the club head is set on a horizontal plane is defined as an origin O, a line passing through the origin O and perpendicular to the horizontal plane is defined as a Y-axis, passing through the origin O and parallel to the horizontal plane, and having a leading edge of the club head. When the axis perpendicular to the X axis is set as the X axis, by providing the weight in the third quadrant of the coordinate system, the center of gravity of the club head can be located below and behind, and the depth of the center of gravity can be reduced. Because of the increase, the ball can be easily lifted when the ball is hit, and a stable shot can be performed.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view of a metal wood golf club head formed in a hollow shape using a metal material as a material. FIG. 2 is a longitudinal sectional side view of a long iron golf club head formed in a hollow shape using a metal material as a material. 3 is a bottom perspective view of FIG. 2, and FIG. 4 is a longitudinal sectional front view of a long iron golf club head.

The club head body 1 of the metal wood golf club head shown in FIG. 1 and the club head body 2 of the long iron golf club head shown in FIGS.
The sole portion 3 and the outer shell portion 4 are integrally formed of a metal material to form the club head bodies 1 and 2 having a hollow structure. The outer shell 4 of the club head body 1 is made of titanium metal, aluminum metal, stainless metal, or the like.
The sole portion 3 is made of tantalum, tungsten metal, or the like, which has a higher specific gravity than the metal material of the outer shell portion 4.

That is, in the first embodiment of the present invention, the sole portion 3 is formed of a metal material having a specific gravity of 3.5 to 11 times the specific gravity of the metal material of the outer shell portion 4 excluding the sole portion 3. And the thickness of the sole portion 3 is 2 mm or more, 3 mm
It is configured with the following settings. In addition, the sole part 3
Is 3.5 with respect to the specific gravity of the metal material of the outer shell 4.
If the thickness is less than 2 times and the thickness exceeds 3 mm, the club head body 1
It has been empirically known that it is difficult to lower the center of gravity. Also, for the specific gravity of the metal material of the outer shell,
If it is 11 times or more, it is very difficult to select and purchase a material, and if the thickness of the sole portion is 2 mm or less, the strength becomes insufficient.

As described above, the club head bodies 1 and 2
With this configuration, the hollow ratio of the head body is increased, and a stable shot can be performed by increasing the moment of inertia around the center of gravity of the club head. Next, in a second embodiment of the present invention, a golf club head having a hollow structure in which a sole portion 3 and an outer shell portion 4 are integrally formed of a metal material,
Below the position of the center of gravity G, more preferably
Is provided.

That is, as shown in FIG. 2, the position of the center of gravity when the club head is installed on a horizontal plane is defined as the origin O, a line passing through the origin O and perpendicular to the horizontal plane is defined as the Y axis, and passing through the origin O is parallel to the horizontal plane. When the axis perpendicular to the leading edge of the club head is the X-axis, the weight 5 is defined by the coordinate system (A in the first quadrant, B in the second quadrant, C in the third quadrant, and C in the fourth quadrant. D) in the third quadrant C, the center of gravity of the club head can be positioned below and behind, and the depth of the center of gravity increases, so that the ball can be easily lifted when hitting the ball. And a stable shot can be performed.

Since the same applies to the club head body 1 of the metal / wood golf club head, the description is omitted. As described above, the sole portion 3 is made of a metal material that is 3.5 times or more the specific gravity of the metal material of the outer shell portion 4 excluding the sole portion 3 and the thickness of the sole portion 3 is 3 mm.
By setting as follows, the center of gravity G of the club head main bodies 1 and 2 can be arranged below, more preferably on the back side, and the hollow ratio is increased as compared with the conventional club head, and the moment of inertia of the club head is increased. By increasing the number of shots, a stable shot can be performed.

Further, by using tantalum, tungsten, or the like having a large specific gravity as the weight 5 and specifying the fixed position, the center of gravity of the club head can be arranged below and behind, and the center of gravity can be arranged. To increase the depth,
This makes it easy to lift the ball when hitting the ball and makes it possible to perform a stable shot.

[0019]

According to the present invention, there is provided a golf club head having a hollow structure in which a sole portion and an outer shell portion are integrally formed of a metal material as described above. The metal part is 3.5 times or more and 11 times or less the specific gravity of the metal part, and the thickness of the sole part is set to 2 mm or more and 3 mm or less. The center of gravity of the head can be located below without adjusting the thickness of the outer shell of the head body with a hollow structure, or attaching a weight. A stable shot can be performed by increasing the moment of inertia.

The position of the center of gravity when the club head is set on a horizontal plane is defined as an origin O, a line passing through the origin O and perpendicular to the horizontal plane is defined as a Y-axis, passing through the origin O and parallel to the horizontal plane, and having a leading edge of the club head. Assuming that the axis perpendicular to the X axis is the X axis, the weight 5 is defined by the coordinate system (assuming the first quadrant is A, the second quadrant is B, the third quadrant is C, and the fourth quadrant is D). By providing the club head in the three quadrants C, the center of gravity of the club head can be arranged below and behind, and the depth of the center of gravity increases, so that the ball can be easily lifted when hitting a ball. There is an effect that a stable shot can be performed as compared with the head.

[Brief description of the drawings]

FIG. 1 is a sectional view of a metal wood golf club head formed in a hollow shape using a metal material as a material.

FIG. 2 is a longitudinal sectional side view of a long iron golf club head formed in a hollow shape using a metal material as a material.

FIG. 3 is a bottom perspective view of FIG. 2;

FIG. 4 is a longitudinal sectional front view of a long iron golf club head.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Club head main body of a metal wood golf club head 2 Club head main body of a long iron golf club head 3 Sole part 4 Outer shell part 5 Weight

Claims (6)

[Claims] 1. A golf club head having a hollow structure in which a sole portion and an outer shell portion are integrally formed of a metal material, wherein the sole portion has a specific gravity of a metal material of the outer shell portion excluding the sole portion. And a golf club head made of a metal material of 3.5 times or more and 11 times or less. 2. The thickness of the sole portion is 2 mm or more and 3 mm or more.
The golf club head according to claim 1, which is set as follows. 3. The club head body according to claim 1, wherein the outer shell metal of the club head body is made of titanium metal, aluminum metal, stainless steel metal or the like, and the metal of the sole portion is made of tantalum, tungsten metal or the like. The golf club head as described. 4. A golf club head having a hollow structure in which a sole portion and an outer shell portion are integrally formed of a metal material, wherein a weight is provided below a center of gravity of the club head body. 5. A center of gravity when the club head is set on a horizontal plane is defined as an origin O, a line passing through the origin O and perpendicular to the horizontal plane is defined as a Y-axis, passing through the origin O and parallel to the horizontal plane, and leading the club head. The golf club head according to claim 4, wherein the weight is provided in a third quadrant of the coordinate system, where the axis perpendicular to the edge is the X axis. 6. The golf club head according to claim 4, wherein the weight is made of a material such as tantalum or tungsten metal.